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a man standing on railway platform listening to the whistle of an engine tat passes the man at constant speed at time " t'' ".
Hoow does the frequency as heard by man changes wid time.
Sketch the graph of "f vs t".
frequency heard by listener from t=0 (when train was approaching and was far apart ) to t=T (when train passes the listener) is constant & given by
f = fo(V/V-Vt) (Vt = speed of train, V speed of sound)
when train has passed the listener then frequency again becomes constant but now it is f1
f1 = fo(V/V+Vt)
now plot this graph by using these two eq
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